My garage door is opening and closing on its own

I experience several times since I got the opener from amazon on Aug 10,2017. I was thinking may be I accidentally touched the control button until I find lots of post on this forum. The model number is "Chamberlain WD832KEVG". I am really worried about the safety of my home now, and need support to fix the problem.

Wenbo, the reason for such an occurrence is often simple. Please take a look at these troubleshooting tips and see if they solve the issue: https://goo.gl/9Gompj. If they don't, post a note here and we'll figure out next steps. Lauren